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Electron–phonon interaction on the (110) surface of Ag and Cu

Sklyadneva, Irina Yu. 1; Heid, Rolf 1; Bohnen, Klaus-Peter; Chulkov, Evgenii V.
1 Institut für Festkörperphysik (IFP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

We report on the first ab initio study of the electron–phonon interaction and its contribution to the lifetime broadening of excited hole (electron) surface states on the (110) surface of Ag and Cu. The calculations based on density-functional theory were carried out using a linear response approach in the mixed-basis pseudopotential representation. The calculated strength of the phonon-mediated scattering varies with the energy position of a hole (electron) state in the surface energy band while a directional anisotropy is noticeable only for occupied surface states. It is shown that the electron–phonon interaction in occupied surface states is largely determined by bulk electronic states and is weak compared to the phonon-induced coupling of excited electrons, characterized by a strong energy dependence due to significant intraband scattering. Analysis of various contributions to the electron–phonon coupling reveals that the bulk phonon modes determine the scattering of excited holes, while the surface phonon modes are more involved in the coupling of exited electrons.

Zitationen: 1
Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Publikationstyp Buchaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISBN: 978-0-12-817185-1
ISSN: 0065-3276
KITopen-ID: 1000104358
HGF-Programm 43.21.01 (POF III, LK 01) Quantum Correlations in Condensed Matter
Erschienen in Rufus Ritchie : A Gentleman and A Scholar. Ed.: R. Sabin
Verlag Academic Press
Seiten 199–223
Serie Advances in Quantum Chemistry ; 80
Schlagwörter Electron-Phonon, phonon modes
Nachgewiesen in Scopus
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